[plugin TheCartPress] TAX ID not stored in orders. Impossible billing.

I everyone,
i’m posting here to, maybe its more “visible”..

I’m using – and supporting – this great plugin but It has a major problem, the mandatory TAX ID requested in the checkout process doesn’t get stored along with the order itself but its stored in an addresses list. So when It comes to billing, it’s almost imposssible to retrieve.
How do you guys deal with this ?
Any help or suggestion wuold be really appreciated. Here’s the original post if needed:
https://community.thecartpress.com/groups/development/forum/topic/customer-data-in-ordersmail-notifications/

cheers
Massimiliano